In PO43- ion, the formal charge on the oxygen atom of the P-O bond is : 

1. +1 2. -1
3. -0.75 4. +0.75

Subtopic:  Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
 60%
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In NO3- ion, the number of bond pairs and lone pairs of electrons on the nitrogen atom is

1. 2, 2

2. 3, 1

3. 1, 3

4. 4, 0

Subtopic:  Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
 70%
From NCERT
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Which species lacks tetrahedral geometry?

1. BH4-

2. NH2-

3. CO32-

4. H3O+

Subtopic:  Hybridisation |
 63%
From NCERT
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The number of π bonds and σ bonds in the following structure is :

1. 6, 19 2. 4, 20
3. 5, 19 4. 5, 20
Subtopic:  Resonance & Nature of Compounds |
 85%
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The species doesn't have unpaired electrons is:

1. \(N^+_2\) 2. \(O_2\)
3. \(O^{2-}_2\) 4. \(B_2\)
Subtopic:  M.O.T |
 71%
From NCERT
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In which of the following molecule/ion all the bonds are not equal?

1.  XeF4

2. BF4-

3. C2H4

4. SiF4

Subtopic:  Polarity |
 57%
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Hydrogen bond will be strongest in : 

1. HCl

2. H2O

3. HI

4. H2S

Subtopic:  van der Waal Force & Hydrogen Bonding |
 84%
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If the electronic configuration of an element is 1s22s22p63s23p63d24s2, the four electrons that participate in the chemical bond formation will be from :

1. 3p6

2. 3p6, 4s2

3. 3p6, 3d2

4. 3d2, 4s2

Subtopic:  Covalent Bond |
 86%
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The correct bond angle for \(\mathrm{sp}^2\) hybridization is:

1. \(90^\circ\) 2. \(120^\circ\)
3. \(180^\circ\) 4. \(109^\circ\)
Subtopic:  Hybridisation |
 88%
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The electronic configurations of the elements A, B, and C are given below.

A  = 1s2  2s2  2p6
B  = 1s2  2s2  2p6  3s2  3p3
C =  1s2  2s2  2p6  3s2  3p5

The stable form of A may be represented by the formula:

1. A 2. A2
3. A3 4. A4
Subtopic:  Covalent Bond |
 81%
From NCERT
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